Automatic injector



2 Sheets-Sheet anew 4 c. w. BARTON AUTOMA/TIQ INJECTOR- Filed July 7,1926 mm, um um 11 mm 4 vv Q N W\ QWJ RI; m 1 m Sept. 11, 1928.

Sept. 11, 1928.

V c; w; BARTON AUTOMATIC INJECTOR F e J ly 1926 2 Sheets-Sheet' @wuemloz,

r I GUM/na Patented Sept. 1 1, 1928.

UNITED STATES PATENT CHARLES WILLIAM BARTON, or PORTSMOUTH, OHIO. 5

AUTOMATIC INJECTOR.

Application filed Juiy 7,

invention relates toa safctydevice in the form of an injector adaptedfor use in connection with steam boilers," the primary object of theinvention being to provide means for automatically replenishing thesupply of. water in a boilerwhen the water has reach d a dan crousl low'level therein;

Another object of the invention is to provide means for automaticallysounding an alarm when the water in the supplytank has been exhausted,thereby indicatingto the operator of a dangerous Condition of the watersupply.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed i and claimed, it being understood that changes in the preciseembodiment. of the invention herein disclosed, may be made within. thescope of what is claimed, without departing fromfthe spirit ofthelinvention.

Referring to the drawings:

Figure 1 is an enlarged sectional view through an ejector constructed inaccordance with the invention. i. V v; Figure 2 is a diagrammatic viewillustrating the application of the ejector. W Referring'to the drawingsin detail, one end of aboiler is indicated by the reference character.5,which is supplied with the usual water gauge 6 for d'eterminingthewater level in the boiler 5 at all times. a

l Commrncatin with the usual trans arent tube of the water gauge 6through the medium of the elbow 7, is a pipe 8, that has its forward endconnected with pipe 9, through the elbow 10', the latter pipe being inas clearlyshown by Figure An exhaust pipe indicated at 10 extends intothe valve chamber 11 so that when the valve to be hereinaftermore fullydescribed, has been moved to its normal position; steam mayexhausttherefrom.

Communicatingwith the lower end of the Water gauge 6 is a pipe 12 whichis substancommunication with the valvetchamber 11,,

, tially long and extends forwardly where ithas communication withthepipe 13 through the T-joint 14. the pipe 18 being in communicationwith the pipe 8 through'the T- coupling 15.

The T-joint 14 embodies an extension 16 that connects with the lower endof the arm valve 28 within the valve a comphsh various results.

1928. Serial No. 121,033.

17 which is pivotally connected through the bracket 18 having pivotalconnection with the valve rod QOdthat carries the valve 21- on itsforward on v Communicating with the valve chamber 11 is a pipe 22 thathas communication with the pipe 23 through the pipe 24, the pipe 23bemgin communication with the pipel25 that has anupwardly extendedendportion 126 extending into the valve chamber 27 in which the valve28operates. p As illustrated by Figure 1, the valve member28 is normallyopen to permitsteam to pass through the valve chamber 27 for pur posesto be hereinafter more fully described. The valve chamber 27 forms apart of the injector which embodies a pipe having an enlarged portion 29that houses the float 30 secured at one end of the bell crank lever .31that has connection with the rod 32 which connects with the valve 28 sothat movement of the float 30 will operate to move the chamber 27 to heiThe reference character 33 indicates a whistle which is designed toreceive steam passing through the valve chamber'27 when at 19, the upperend ofthe arm i the valve member 28 has moved inwardly to allow steamtopass into the whistle.

- c It will be obvious that such a movementof the valve 28 will occurwhen the water in the feed pipe 1 and enlarged portion 29 thereof fallsbelow a predetermined level in the pipe or below the float 30, whereuponthe float will drop downwardlv moving the valve 28 to admit steam to thewhistle.

The pipe 34 communicates with the'enlarged portion 290i the feed pipe,341's dividedby the wall 35 that isformed whichpipe with an openingproviding a seat for the valve'36 carried on the inner end of the valverod 37 there being provided a pisto'n'38 on the opposite end of the rod37 to receive the action of the coiled spring 39 to move the rod 37 inone direction, and to receive the force of steam passing through pipe4O, t0 move the rod 37 in the opposite direction.

This piston 38 moves in the cylinder 41, which is supported by the rods42 that extend through openings in the flange 43 of the cylinder, therods also passing through openings in the removable head 4Afas shown byFigure 1. v

The main or body portion of the, injector is indicated at and is incommunication withzthe upper'end of the pipe 34 at 46, so that when thevalve member 36 is moved to its open position, fluid may pass upwardlyinto the injector body 45, to accomplish the purpose of the invention.

The body portion of the injector is divided through its central portionby means of the Wall 47 thereby providing a front compartment 48 and arear compartment 49, the wall 47 having a threaded opening to receivethe threaded portion of the nozzle 50 which has a discharge flared end51 extending an appre ciable distance within the compartments 48.

The inner end of the nozzle 50 is tapered defining a seat for the valve52 carried at the innerend of the rod 53 which in turn has a piston 54mounted on its outer end. This piston 54 operates in the cylinder 55andis held to the limit of its inward movement by means of the coiledspring 56, there being provided an opening 57 at the opposite end of thecylinder 55 inwhich one end of the pipe 58 is positioned, which in turnconnects with the pipe 59 through the elbow 60, the latter pipe being incommunication with the cylin der 41, at a point beyond the piston 38.

The pipe 61 is in communication with the compartment 49 that in turn isin communication with the upper portion of the boiler for the purpose ofsupplying steam to the compartment 49 and nozzle 50 when the valve 52hasbeen moved to its open position.

Connected with the body portion of the injector is a water feed pipe 62that is also in communication with the boiler to supply water thereto,when the supply of water has reached a dangerously low level in theboiler.

From the foregoing it will be obvious that should the water level in theboiler 5 reach a dangerously low point, the pipe 12 will expand or moveforwardly, moving the arm 17 andvalve'rod connected'therewith to causethe valve member 21 to move rearwardly,

opening the passageway through the valve chamber 11 allowing steam inthe boiler to pass through pipe 23, pipe 25 and pipe 26 from where itpasses through the valve chamber27, pipe 40 and into the cylinder 41behind the piston 38, whereupon the steampressure will force the rod 37rearwardly, unseating the valve 36 and allowing water to pass upwardlyinto the compartment 48.

As the piston 38 moves within the cylinder 41, the opening to the pipe59 will be cleared and steam will be permitted to pass into the cylinder55 through pipe 58, the steam acting against the piston 54 to unseat thevalve 52, and allowing steam from the boiler to pass through pipe 61,compartment 49 and into the nozzle 50, where the steam is dischargedthrough the vflared extremity 51 of the nozzle, which steam acts as aninjector to force water through the pipe 63 and into the feed pipe 62from where it passes to the a boiler to replenish the water supplytherein.

Should the water in the supply pipe and supply tank become exhausted, itis obvious that the float 30 will fall downwardly moving the valve 28 toa position to allow steam to pass into the whistle 33 and sound an alarmto indicate to the attendant the condition of'the water supply.

It will be obvious that as the cold water enters the-boiler, the pipe 12will contract to move the valve 21 to its normal position shutting offthe steam supply and allowing the spring 39 and spring 56 to resent thevalves and cause the various elements of the injector to assume theirnormal positions.

I claim: i i I In combination with a steam boiler, an automatic injectorincluding a body portion formed with a dividing wall dividing the bodyportion into front and rear compartments, a nozzle supported in thedividing wall, a valve within the rear compartment for normally closingthe nozzle, a pipe establishing communication between the frontcompartment and boiler. a pipe for establishing communication betweenthe rear compartment and boiler to deliver steam to the rearcompartment, ;a water feed pipe connected with the body portion, a valvefor normally preventing water from entering the body portion, andtheri'nostatically con trolled means for operating the valves tosimultaneously admit steam and water to the body portionto inject waterinto the boiler. In testimony that I claim the foregoing as my own, Ihave hereto affixed mysignature.

CHARLES WILLIAM BARTON.

